/Engine/Source/Editor/UnrealEd/Public/Elements/SMInstance/SMInstanceElementEditorWorldInterface.h
Can the element be promoted Generally available when the element is lighter representation of another element. Like promoting a static mesh instance from an instanced static static component to a static actor for example.
virtual bool CanPromoteElement ( const [FTypedElementHandle](API\Runtime\TypedElementFramework\Elements\Framework\FTypedElementHandle) & InElementHandle )